what to do when toddlers with different ages don't have activity they can do together

[iziraray]

I have 2 daughters, first is almost 4 n the last is almost 1.5. I really runs out of ideas sometimes on other activities that aren't involving television and ipad (i know, it's bad) while I need to do other things around the house. Nothing works for more than 10mins tops, except for the tv. Any ideas please? :)

My toddlers spend ages playing Lego, playmobil, dolls house, toy farm..... Or chalks on the chalkboard, play doh. We have a small indoor slide which they spend a lot of time on and a ball pool.

I keep them away from felt tips and crayons if I'm not there to supervise though because of the mess.