This book is filled with science projects of varying degrees. There are more simple variations for preschoolers, but there are also more complex options for older children. I have started saving these activities to do when the Mr. is home so that we can all participate in the fun (and I have more adults to help me hehe). We will sometimes do them in the evenings or on the weekends. I'm finding that my husband really looks forward to doing an educational activity like this and so it really is a fun family project.
What I do is select 2-3 ideas to go with each unit, which again is 2 weeks for us. When we were working on the letter 'C' I selected growing Crystals & painting Coffee filters.
We did these during Hurricane Harvey when we were stuck at home for about 2 weeks and this really helped with cabin fever!
Obligatory Blogger Disclaimer: I was not compensated for this post, I just really like the brand.