My husband is also on Spring Break this week -- which reduces my computer time by a lot!
I thought this would be a fun view of our days. I recently ordered a booster seat for my son.
If you are interested, I bought a Britax Frontier 85...which is a 5-point harness up to 100 lbs that converts to a booster. I will most definately pay the money for the piece of mind for my child, as I wanted to keep him in a harness for as long as possible. But I suppose that is another post for another time....
Regardless of that, the box was an awesome treat for my kiddos!
We cut the box to make into a vehicular shape....is vehicular even a word?
This thing has been living in our home for nearly 3 weeks now. 
The car/train/boat has windows....
and room for babies....without carseats. I guess I need to discuss the importance of safety with these little ones.
Since its creation, the box has been colored on and decorated with cut out shapes and various stickers. Wheels have been added with paper plates.
You can do this with any box.
Check with your local grocery store if you need some....they are more than willling to let you have boxes.
Seriously, hours and hours of fun for your kiddos.