DIY coffee table

I had made 2 side tables earlier this year ( will upload the tutorial later) for my lounge room, But I wasn't really sure about keeping a coffee table in the room, since it's not that big, I wanted something small and light, And my DD spends most of her day in that room, I wanted something child friendly, light in weight, no hard corners...., I thought about using a soft furnished ottoman as a table, but I already have 2 ottoman as a side seats for the room plus a huge sofa, So the dilemma continued, until one day strolling across my local hardware store I saw building foam sheets, light in weight, not too hard not too soft..I literally had a light bulb moment, and the idea of making a coffee table came into being!