Why don‘t the Rainbow, Semicircles and Building Boards exactly fit together?
The Semicircles and Building Boards are larger than the individual parts of the Rainbow, sometimes by up to 1cm. Is that normal?
Yes, the Building Boards and Semicircles are deliberately made to be larger than the corresponding bow elements of the 12 Piece Rainbow. As a result, younger builders can achieve greater success in building because not everything must be set precisely. This leads to more stable structures and more joy in playing!