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HTML 

              
                .sun
.cloud
.tree
    .leaves
    .leaves
    .leaves
.bouncy-container 
    .bouncy
        .hair
        .left-eye.eye
            .eyebrow
            .pupil
                .reflection
        .right-eye.eye
            .eyebrow
            .pupil
                .reflection
        .nose
        .mouth
            .teeth.top
            .teeth.bottom
.chair
    .seat
    .legs-container
        .legs
        .legs
        .legs
        .legs
.balloon
    .balloon-bottom
    .balloon-string
.trampoline
.leg-container
    .leg
    .leg
    .leg
    .leg
    .leg
    .leg
.grass
!

CSS 

              
                @import "compass/css3";

body {
  background: skyblue;
  height: 1000px;
  overflow: hidden;
}


// Sun
.sun {
  background: yellow;
  height: 100px;
  width: 100px;
  position: absolute;
  border-radius: 100%;
  box-shadow: 2px 2px 0 2px rgba(255, 254, 0, 0.7);
  right: 10px;
  top: 10px;
}


// Cloud
.cloud {
  top: 50px;
  width: 200px;
  height: 60px;
  right: -200px;
  background: #fff;
  border-radius: 200px;
  position: relative;
  box-shadow: 2px 2px 0 3px #eee;
  animation: moveclouds 20s linear infinite;
}
.cloud:before, .cloud:after {
  content: '';
  position: absolute; 
  background: #fff;
  width: 100px; 
  height: 80px;
  position: absolute;
  top: -15px;
  left: 10px;
  border-radius: 100px;
  transform: rotate(30deg);
}


// Tree
.tree {
  background: brown;
  height: 350px;
  width: 65px;
  position: absolute;
  bottom: 30px;
  right: 150px;
  z-index: 10;
  box-shadow: -4px -4px 0 4px rgba(174, 56, 49, 1.0);
}
.leaves {
  border-radius: 100%;
  height: 200px;
  width: 200px;
  position: absolute;
  box-shadow: -5px 5px 0 6px rgba(31, 137, 10, 1.0);
  animation: tree 1s infinite alternate;
  z-index: 11;
}
.leaves:nth-child(1) {
  bottom: 330px;
  right: 0px;
  background: rgba(21, 127, 0, 1.0);
}
.leaves:nth-child(2) {
  bottom: 300px;
  right: -130px;
  background: #1d8223;
}
.leaves:nth-child(3) {
  bottom: 430px;
  right: -70px;
  background: #319118;
}


// Mr Bouncy
.bouncy-container {
  position: absolute;
  bottom: 0px;
  margin-bottom: 260px;
}
.bouncy {
  position: relative;
  height: 300px;
  width: 300px;
  left: 100px;
  background: #CE967C;
  border-radius: 50% / 100% 100% 0 0;
  box-shadow: 5px 5px 0 5px rgba(186, 130, 104, 1.0);
  animation: bounce-face .5s infinite alternate;
  display: block;
  z-index: 6;
}
.hair {
  width: 80%;
  height: 95px;
  background: rgba(242,218,145,1.0);
  background-image: linear-gradient(145deg, rgba(255, 255, 255, .2) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .2) 50%, rgba(255, 255, 255, .2) 75%, transparent 75%, transparent);
  position: absolute;
  border-radius:100px 10px/50px 0;
  box-shadow: 2px -2px 0 3px rgba(242,218,145,0.6);
  margin: -10% 0 0 4%;
  animation: bounce-hair .5s infinite alternate;
  z-index: 7;
}
.eye {
  height: 50px;
  width: 17.5%;
  background: white;
  position: relative;
  display: inline-block;
  border-radius: 100%;
  box-shadow: 1px 1px 0 2px rgba(186, 130, 104, 0.2);
}
.left-eye {
  top: 100px;
  left: 75px;
}
.right-eye {
  top: 100px;
  left: 100px;
}
.eyebrow {
  border-radius: 100% 0 0 0 / 50% 0 0 0;
  background: rgba(242,218,145,0.5);
  position: relative;
  height: 15px;
  width: 100%;
  margin-top: -25%;
  animation: eyebrows .5s infinite alternate;
}
.pupil {
  background: black;
  height: 25px;
  width: 25px;
  top: 12.5px;
  left: 12.5px;
  position: relative;
  border-radius: 100%;
}
.reflection {
  background: white;
  height: 5px;
  width: 5px;
  border-radius: 100%;
  top: 8px;
  left: 11px;
  position: relative;
  animation: reflection .5s infinite alternate;
}
.nose {
  background: rgba(186, 130, 104, 0.5);
  height: 45px;
  width: 20px;
  position: relative;
  top: 100px;
  left: 125px;
  border-radius: 100% 10px 10px 10px;
}
.mouth {
  background: rgba(186, 130, 104, 0.5);
  height: 15px;
  width: 28%;
  position: relative;
  top: 125px;
  left: 30%;
  border-radius: 50% / 0 0 100% 100%;
  box-shadow: 0 0 0 7px rgba(186, 130, 104, 0.5);
  animation: smile .5s infinite alternate;
}
.teeth {
  background: white;
  height: 5px;
  width: 100%;  
}
.teeth.top {
  top: -2px;
  position: relative;
  border-radius:0;
  border-bottom: 3px dashed white;
}
.teeth.bottom {
  height: 8px;
  border-radius: 50% / 0 0 100% 100%;
  animation: teeth .5s infinite alternate;
}


// Chair
.chair {
  position: absolute;
  width: 100px;
  height: 100px;
  background: #333;
  bottom: 0;
  right: 300px;
  margin-bottom: 250px;
  border: 5px solid #222;
  border-bottom: none;
  box-sizing: border-box;
  z-index: 3;
}
.seat {
  background: #444;
  position: absolute;
  width: 100px;
  height: 50px;
  bottom: -55px;
  right: -26px;
  border: 5px solid #222;
  box-sizing: border-box;
  z-index: 6;
  transform: skew(40deg,0deg);
}
.legs-container {
  position: absolute;
  left: -5px;
  top: -5px;
}  
.legs {
  height: 100px;
  width: 5px;
  display: inline-block;
  position: relative;
  float: left;
  background: #222;
  z-index: 3;
}
.legs:nth-child(1) {
  top: 100px;
}
.legs:nth-child(2) {
  top: 100px;
  left: 90px;
}
.legs:nth-child(3) {
  top: 150px;
  left: 30px;
}
.legs:nth-child(4) {
  top: 150px;
  left: 120px
}


// Balloons
.balloon {
  position: absolute;
  height: 125px;
  width: 100px;
  border-radius: 100% / 100%;
  background: red;
  box-shadow: -2px 2px 0 3px rgba(234, 30, 20, 1.0);
  bottom: 500px;
  right: 350px;
  animation: balloon 1s infinite alternate;
}
.balloon-bottom {
  height: 10px;
  width: 10px;
  position: absolute;
  background: red;
  border-radius: 100%;
  top: 125px;
  left: 45px;
  z-index: 3;
  animation: balloon-bottom 1s infinite alternate;
}
.balloon-string {
  position: absolute;
  width: 2px;
  height: 350px;
  background: white;
  top: 125px;
  left: 54px;
  z-index: 2;
  animation: balloon-string 1s infinite alternate;
}


// Trampoline
.trampoline {
  position: absolute;
  background: #999;
  background: radial-gradient(ellipse at center, #777777 0%,#888888 50%,#999999 100%);
  height: 40px;
  width: 400px;
  bottom: 0;
  left: 55px;
  margin-bottom: 230px;
  border-radius: 100%;
  border: 5px dotted #333;
  box-shadow: 0 0 0 10px #555;
  z-index: 5;
  animation: bounce-trampoline .5s infinite alternate;
}
.leg-container {
  position: absolute;
  height: 40px;
  width: 400px;
  left: 60px;
  bottom: 0;
  margin-bottom: 230px;
}
.leg {
  height: 150px;
  width: 10px;
  background: #555;
  display: inline-block;
  position: relative;
  float: left;
  z-index: 4;
  box-shadow: 4px -3px 0 2px #444;
}
.leg:nth-child(1) {
  top: 50%;
  left: -3.7%
}
.leg:nth-child(2) {
  top: 100%;
  left: 25%;
  z-index: 1;
}
.leg:nth-child(3) {
  top: 100%;
  left: 65%;
}
.leg:nth-child(4) {
  top: 50%;
  left: 92.3%;
}
.leg:nth-child(5) {
  left: 13%;
}
.leg:nth-child(6) {
  left: 50%;
}

.grass {
  background: green;
  width: 100%;
  height: 200px;
  position: absolute;
  bottom: 0;
  border-top: 10px solid rgba(21, 127, 0, 0.6);
  background-color: green;
  background-image: linear-gradient(45deg, rgba(255, 255, 255, .2) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .2) 50%, rgba(255, 255, 255, .2) 75%, transparent 75%, transparent);
}
   
@keyframes bounce-face
{
  to { 
    border-radius: 40% / 100%;
    bottom: 3em;
  }
  from {
    bottom: 0;
  }
}
@keyframes bounce-hair
{
  from { 
    width: 58%;
    margin-left: 55px;
    border-radius: 100px 10px/70px 0;
  }
}
@keyframes bounce-trampoline
{
  from { 
    border-radius: 100% / 85%;
    margin-top: 5px;
  }
}
@keyframes moveclouds
{
  0% {margin-left: 1000px;}
	100% {margin-left: -1000px;}
}
@keyframes smile
{
  to { height: 20px; } 
}
@keyframes teeth
{
  to { margin-top: 5px; } 
}
@keyframes reflection
{
 to { top: 6px; left: 14px; }
}
@keyframes eyebrows
{
  to { margin-top: -21px; transform: rotate(3deg); }
}
@keyframes tree
{
  to { box-shadow: -1px 7px 0 6px rgba(31, 137, 10, 1.0); }
}
@keyframes balloon
{
  to { right: 370px; }
}
@keyframes balloon-bottom
{
  to { left: 35px; }
}
@keyframes balloon-string
{
  to { transform: skew(5deg,0deg); }
}
!

JS
!
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