While my DH is really a stay at home person when it is my days with DS I much prefer to go out. Anywhere is good - the park, the pool, the library, the shops. I like to keep busy and I get stuck for ideas at home. Also playgroups are great and give you good ideas as well. Try to arrange some play dates. Otherwise some home ideas that tend to occupy them for a while are things like wading pools and sandpits. Look for ideas where he can't actually see the tv as out of sight out of mind is so true.