Hip Homeschool Hop 8/24

For the Hip Homeschool Hop, the question is: What do you currently use as a student desk in your homeschool classroom?
Since we don't have a house, we don't have a desk! As we roadschool, the kids learn wherever we are, so they might use the RV kitchen table, couch, floor, picnic tables, trees, very often their laps in the truck on the road, floors in visitors centers, benches in parks, shopping carts in stores, sand on the beach, just about anywhere!