Groups/Activities ideas for my dad to do with my 16 month old

Hi everyone ! I’m due to start a new part time job in a few weeks time so my dad will be taking care of my 16 month old daughter on a Thursday. I think they would both enjoy an activity or group to do together on a weekly basis, and I think it would make the day easier to have a routine to stick to. A swimming group would be a bit uncomfortable for my dad (generally it’s mums) plus the changing before and after can be quite difficult - so not swimming ! Does anyone have any suggestions for groups in and around Bath on a Thursday which would be welcoming and comfortable for my dad to do with my daughter ? 🙏🙏 Thanks in advance ❤️