We've still got a week before our half term starts, but I'm very low on ideas for what to do. DS1(7) has broken his leg and is in a full leg cast. The cast is so big he's struggling to do anything with crutches, so is using a wheelchair for getting around. He's been a little trooper, and his school have been brilliant at setting things up so he can access everything, but now we've got a week of free time upcoming and I'm stumped!
All our usual activities - swimming, soft play, playgrounds etc - are out. We usually have a day out or two with grandparents at National Trust places but they're not all fantastically wheelchair-friendly. He also has a strong sense of justice (he's autistic, which may or may not be related to this) and won't like anything where DS2(4) gets to do things he can't. He would probably quite happily spend the entire break playing Minecraft, but I'd like a bit of variety!
Any ideas? Activities, days out, even a mini UK-based holiday could be an option. We are in Milton Keynes so South Midlands/South East best, but can travel if there are suitable things further afield! Thank you!