My two year old granddaughter has enjoyed playing with this as well as her older siblings who seem to have enjoyed it even more.  The gears are easy to arrange and put into motion.  It has not been one of those toys that she continues to play with every day,  but one that is fun to get out from time to time and play with again.  It is a nice size, enough room to put all the gears on but not too big as to be too hard to manage.