We got this to entertain our 3 boys all under the age of 2 and all weigh over 13 pounds.  It is very sturdy and stable even our largest (20lb) will play on it and the ladders are great for him.  The platforms are too small for them to curl up and lay on but they have fun playing king of the mountain on them.  They love curling up in the little houses and napping and it is super soft.  This is a really large tree and the platforms are incredibly high - none of ours have been brave enough to climb all the way to the top.