We had a great day today playing with our new construction system at the Old Blue Coat School in Thatcham. Around 25 children helped us test it out and made all manner of contraptions. We were pretty pleased how it worked, although we might redesign the angled plastic connectors as they turned out to be a bit fragile.
The system is designed to be a bit similar to mecano, with a series of different length bars with equally spaced holes in them, that can be joined together. The difference is ours is more suitable for younger children - the pieces are much larger, and instead of nuts and bolts our system uses some very clever plastic rivets. These simply push into the hole, and expand to lock the two holes together - much easier for children to use. They can also be pushed back out from the other side of the hole, and reused as many times as you like. Combined with a series of small plastic brackets, the bars and rivets can be used to make all manner of creations that are quite large in scale very quickly.
Many thanks to all the human guinea pigs who helped out!