Let the whole house get quiet. Recharge your own batteries while the kids are recharging theirs. Doing basically the same thing, day in and day out, gets boring. Try new activities, especially things that get everybody outside. Invite playmates over, and allow kids to visit friends' homes.
Kids enjoy a change of scenery, and like playing with different toys.
If there aren't any families close by, head for the local library, swimming pool or park, where you're likely to find other little boys and girls ready to play. It's true that there isn't as much money to work with when only one spouse is bringing in a regular paycheck. Don't fall prey to instant gratification, which steals your precious dollars. Pare down expenses. Postpone purchases and use coupons, rebates, and discount stores.