Andrew's First Science Project- Growing Robot

When I was buying little toys to take on the airplane with us for our Arizona trip, I found this cute little robot that grows in water.  Andrew is a pretty typical little boy who gets excited about stuff like robots and monsters and trucks and trains, so I knew he would like this.

We put it in a huge container of water and left it alone for a day at a time.  Andrew loved checking on his robot every day.

Once I thought it had reached full size we left it out of the water and kept checking on it every day until it had shrunk back to original size.  He now keeps the robot in his room.

I need to come up with more simple projects for Andrew to do since he loved this so much!