No offence Jan, but your ILs aren't the parents of your bub. THeir policy doesn't have to be yours for heavens sake!
I started Darc at 16 months because I had to (we moved 600km away from family, DH went interstate for a few months I had to work) and it was the best thing she's done. She loves going and admittedly as she had to go 3 days settling wasn't an issue but she asks to go on weekends and even asked me Christmas day if she could go....