My 2 1/2 yo niece was allowed in the club solo on our feb trip as she was potty trained. We were warned however that this was oon a trial basis. Worked out great, and she loved the club. If your child is potty trained, and used to playing w/older children (preschool, daycare, siblings and so on) you will probably be able to have your child in the club providing that there is space.