Was talking to someone at the Stockport meet up about this.
Went to a baby show/fair thing recently- LOADS of stalls promoting activities- tumble tots, baby modelling, messy art class, dance, music etc etc. I don't do anything regularly with my 3yo ds apart from toddlers every week and visiting the library, but nothing structured. Wondered if this was the norm. I felt a bit like I should be doing more, but maybe this is what these people are relying on?