If you could use an air mattress for the kids, here is a nice deal. Walmart has this Intex Twin 8.75″ Classic Downy Inflatable Airbed Mattress for $7.97 (was $15.97).
Product Details:
- Perfect for both in-home use and camping
Plush flocked top
Flocked top keeps the sheets in place
Easy to clean
Compact for storage
Extra wide valve openings for fast inflating and deflating
Measures: 39″L x 75″W x 8.75″H
Model# 68757WL
Intex twin airbed mattress comes in navy