I love any excuse to make something with duct tape, but I'd probably want something sturdier -- at least in my house. My kids would demolish a cardboard table top in about 2 minutes!
You should be able to have the plywood cut to size at a lumber yard/Home Depot. Then, you could use a few pieces of rough sandpaper to smooth the edges a bit and paint. Shouldn't be too hard.
Tara
living a crazy life with 3 boys
I am thinking now
of grief, and of getting past it;
I feel my boots
trying to leave the ground,
I feel my heart
pumping hard. I want
to think again of dangerous and noble things.
I want to be light and frolicsome.
I want to be improbable beautiful and afraid of nothing,
as though I had wings.
~Mary Oliver