my husband & i bought the entire rainforest collection when our daughter was born & this was by far the best out of the collection, & out of all the baby toys that we bought. my daughter was first able to use it when she was three months old (& she was a tiny three month old). she used it until she was almost one & then we sold it on craigslist. it was a very, very easy set up which took me about five minutes. the batteries were put it easily and we only had to change them ONCE in the entire year it was used. it says it has three size levels but it technically has four, and she only went as high...