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HTML 

              
                <div class="wrapper">
	<header>
		<h1> Kids’ timetable generator</h1>
	</header>
	<div class="button-wrapper">
		<button data-btn type="button">Sort activities</button>
		<button class="clear-button" data-clear type="button">Clear timetable</button>
	</div>
	<div class="grid">
		<table>
			<thead>
				<th scope="col">Time</th>
				<th scope="col">Monday</th>
				<th scope="col">Tuesday</th>
				<th scope="col">Wednesday</th>
				<th scope="col">Thursday</th>
				<th scope="col">Friday</th>
			</thead>
			<tbody>
				<tr>
					<th scope="row">7:30am</th>
					<td><span>Breakfast</span></td>
					<td><span>Breakfast</span></td>
					<td><span>Breakfast</span></td>
					<td><span>Breakfast</span></td>
					<td><span>Breakfast</span></td>
				</tr>
				<tr class="bg-yellow">
					<th scope="row">9:00am</th>
					<td><span>Exercise</span></td>
					<td><span>Exercise</span></td>
					<td><span>Exercise</span></td>
					<td><span>Exercise</span></td>
					<td><span>Exercise</span></td>
				</tr>
				<tr class="bg-green">
					<th scope="row">9:30am</th>
					<td><span>Free play</span></td>
					<td><span>Free play</span></td>
					<td><span>Free play</span></td>
					<td><span>Free play</span></td>
					<td><span>Free play</span></td>
				</tr>
				<tr>
					<th scope="row">10:00am</th>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
				</tr>
				<tr>
					<th scope="row">11:00am</th>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
				</tr>
				<tr>
					<th scope="row">12:00</th>
					<td><span>Lunch</span></td>
					<td><span>Lunch</span></td>
					<td><span>Lunch</span></td>
					<td><span>Lunch</span></td>
					<td><span>Lunch</span></td>
				</tr>
				<tr class="bg-green">
					<th scope="row">1:00pm</th>
					<td><span>Free play</span></td>
					<td><span>Free play</span></td>
					<td><span>Free play</span></td>
					<td><span>Free play</span></td>
					<td><span>Free play</span></td>
				</tr>
				<tr>
					<th scope="row">2:00pm</th>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
				</tr>
				<tr>
					<th scope="row">3:00pm</th>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
				</tr>
				<tr>
					<th scope="row">4:00pm</th>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
					<td data-cell></td>
				</tr>
				<tr class="bg-green">
					<th scope="row">5:00pm</th>
					<td><span>Free play/TV</span></td>
					<td><span>Free play/TV</span></td>
					<td><span>Free play/TV</span></td>
					<td><span>Free play/TV</span></td>
					<td><span>Free play/TV</span></td>
				</tr>
				<tr>
					<th scope="row">6:00pm</th>
					<td><span>Dinner</span></td>
					<td><span>Dinner</span></td>
					<td><span>Dinner</span></td>
					<td><span>Dinner</span></td>
					<td><span>Dinner</span></td>
				</tr>
			</tbody>
		</table>

		<ul class="activities" data-activities>
			<li>
				<div class="activity" style="--bg: #adff8a; --r: -2deg">Baking</div>
			</li>
			<li>
				<div class="activity" style="--r: -4deg">Painting</div>
			</li>
			<li>
				<div class="activity" style="--bg: #ff8af5; --r: 2.5deg">Painting</div>
			</li>
			<li>
				<div class="activity" style="--bg: #adff8a; --r: 1.25deg">Treasure hunt</div>
			</li>
			<li>
				<div class="activity" style="--bg: #ff8af5; --r: -2deg">Cutting and sticking</div>
			</li>
			<li>
				<div class="activity" style="--bg: #adff8a; --r: 2.5deg">Cutting and sticking</div>
			</li>
			<li>
				<div class="activity" style="--r: -4deg">Drawing/writing practice</div>
			</li>
			<li>
				<div class="activity" style="--bg: #ff8af5; --r: 1.25deg">Drawing/writing practice</div>
			</li>
			<li>
				<div class="activity" style="--bg: #adff8a; --r: -2deg">Indoor games</div>
			</li>
			<li>
				<div class="activity" style="--bg: #ff8af5; --r: 2.5deg">Board games/puzzles</div>
			</li>
			<li>
				<div class="activity" style="--bg: #adff8a; --r: -4deg">Nature walk</div>
			</li>
			<li>
				<div class="activity" style="--r: 1.25deg">Outdoor games</div>
			</li>
			<li>
				<div class="activity" style="--r: -4deg">Building blocks/Lego</div>
			</li>
			<li>
				<div class="activity" style="--bg: #adff8a; --r: 2.5deg">Play-doh</div>
			</li>
			<li>
				<div class="activity" style="--r: -2deg">Stickers</div>
			</li>
			<li>
				<div class="activity" style="--bg: #ff8af5; --r: 1.25deg">Making/crafting</div>
			</li>
			<li>
				<div class="activity" style="--bg: #adff8a; --r: -4deg">Shopping</div>
			</li>
			<li>
				<div class="activity" style="--bg: #ff8af5; --r: -2deg">Monster truck race course</div>
			</li>
			<li>
				<div class="activity" style="--bg: #adff8a; --r: -4deg">Running</div>
			</li>
			<li>
				<div class="activity" style="--r: 1.25deg">Running</div>
			</li>
			<li>
				<div class="activity" style="--r: -2deg">Reading</div>
			</li>
			<li>
				<div class="activity" style="--bg: #ff8af5; --r: -4deg">Family Facetime</div>
			</li>
			<li>
				<div class="activity" style="--r: 2.5deg">Gardening</div>
			</li>
			<li>
				<div class="activity" style="--bg: #adff8a; --r: 1.25deg">Cars</div>
			</li>
			<li>
				<div class="activity" style="--bg: #ff8af5;   --r: 2.5deg">Chalks</div>
			</li>
		</ul>
	</div>
</div>
!

CSS 

              
                @import url('https://fonts.googleapis.com/css?family=Caveat+Brush|Ubuntu:400,700&display=swap');

$pink: #ff8af5;
$yellow: #fcf3b8;
$green: #adff8a;

* {
	box-sizing: border-box;
}

body {
	font-family: 'Ubuntu', sans-serif;
}

button {
	background-color: #da42f5;
	border: none;
	padding: 1rem 2rem;
	color: white;
	font-size: 1.2rem;
	font-family: inherit;
	border-radius: 0.4rem;
	margin-right: 1rem;
	
	&:hover,
	&:focus {
		background-color: darken(#da42f5, 20%);
	}
	
	&.clear-button {
		background-color: #67f5dd;
		color: black;
		
		&:hover,
	&:focus {
		background-color: darken(#67f5dd, 20%);
	}
	}
}

.button-wrapper {
	display: flex;
	flex-wrap: wrap;
}

table {
	text-align: left;
	border-collapse: collapse;
}

th,
td {
	vertical-align: top;
	padding: 0.75rem;
}

td {
	font-family: 'Caveat Brush', cursive;
	font-size: 1.2rem;
	border: 3px solid;
	min-width: 10rem;
	
	span {
		background-color: $pink;
	}
	
	&[data-cell] {
		height: 10rem;
	}
}

.bg-yellow {
	td {
		span {
			background-color: $yellow;
		}
	}
}

.bg-green {
	td {
		span {
			background-color: $green;
		}
	}
}

thead {
	th {
		border-right: 3px solid;
	}
}

tbody {
	th {
		border-top: 3px solid;
	}
	
	tr:last-child {
		th {
			border-bottom: 3px solid;
		}
	}
}

.wrapper {
	max-width: 90rem;
	padding: 1rem 2rem;
	margin: 0 auto;
}

.activity {
	width: 8rem;
	min-height: 8rem;
	display: block;
	hyphens: auto;
	padding: 0.5rem;
	background-color: var(--bg, $yellow);
	text-align: center;
	display: flex;
	align-items: center;
	justify-content: center;
	box-shadow: 0.2rem 0.2rem 0.75rem rgba(0, 0, 0, 0.2);
	font-family: 'Caveat Brush', cursive;
	font-size: 1.2rem;
	transform: rotate(var(--r, -2deg));
}

.activities {
	list-style: none;
	margin: 0;
	padding: 0;
	flex: 1 1 auto;
	display: grid;
	grid-template-columns: repeat(3, 8rem);
	gap: 1rem;
	
	li {
		min-height: 8rem;
		display: block;
		hyphens: auto;
		text-align: center;
		display: flex;
		align-items: center;
		justify-content: center;
		font-family: 'Caveat Brush', cursive;
		font-size: 1.2rem;
	}
	
	@media (min-width: 85rem) {
		max-width: 40rem;
		margin-left: auto;
	}
}

.grid {
	margin-top: 2rem;
	
	@media (min-width: 85rem) {
		display: grid;
		grid-template-columns: 40rem 1fr;
		gap: 2rem;
		align-items: start;
	}
}
!

JS 

              
                const listEl = document.querySelector('[data-activities]')
const activities = [...document.querySelectorAll('[data-activities] li')]
const cells = [...document.querySelectorAll('[data-cell]')]
const btn = document.querySelector('[data-btn]')
const clear = document.querySelector('[data-clear]')

const shuffle = (array) => {
	let a = [...array]
	
	for (let i = a.length - 1; i > 0; i--) {
		const j = Math.floor(Math.random() * (i + 1));
		[a[i], a[j]] = [a[j], a[i]];
	}
	
	return a
}

const clearTimetable = () => {
	cells.forEach((el, i) => {
		el.innerHTML = ''
	})
	
	listEl.style.display = 'grid'
}

const sortActivities = () => {
	const activitiesList = shuffle(activities)
	
	cells.forEach((el, i) => {
		el.innerHTML = ''
		
		if (i < activities.length) {
			el.innerHTML = `${activitiesList[i].innerHTML}`
		}
	})
	
	listEl.style.display = 'none'
}

btn.addEventListener('click', sortActivities)
clear.addEventListener('click', clearTimetable)
!
999px

Console