I think you could still join even though your daughter is only 3. She wouldn't be able to use the messaging and games that some of the older girls enjoy, but you could still earn stars as her adult partner and buy club merchandise. It costs $20 to join, but you get a $10 off online discount on your first AG purchase after you register. This $10 discount can be combined with another code like the free shipping code. At the time that my daughter joined, there was a $10 off code and I was able to combine it with the $10 off club code to get $20 off of Nellie.