Developmental windows are wider at later ages, so The Play Kits for children aged 1-year-old and up are shipped every 3 months, instead of every 2 months, and the cost of each Play Kit changes from $80 to $120, or from $92 to $138 if you purchase the single Play Kits without a subscription. If you break it down to the price per month of play, the cost remains the same.