I personally hate sand but thankfully we live really close to a sandy playground so I don't feel guilty for not offering it haha. Inside I do rice or pasta in shallow containers. I put toys in their containers so they play longer. I would like to do the coloured cooked spaghetti but haven't gotten around to it yet. Another thing we do is "cloud dough" its a mixture of flour and baby oil, they love it. I haven't done it in awhile but slime is another popular one and it's actually not messy like I thought it would be. I wanna say its borax, white glue and water but it's been awhile so I could be wrong!! I found the recipes on pinterest. Homemade play dough is another good sensory project.

We do most of our water play outside and this year we did a car wash where they got to wash all their cars and outdoor toys. That was a huge hit, will definitely do it every summer. Inside on a low number day I will let them play in the bathtub.