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A set of colored bead squares
- One large yellow equilateral triangle with a black line along all sides
A pair of sweet solutions (sugar or honey)
This ingenious representation of a classic design allows the builder to discover the principle of the keystone and its function in the support of an arch
The material consists of 9 green metal frames with bottoms and red insets with 1 set of 5 circles decreasing in diameter and 1 set of 4 squares decreasing in length and width
Box for Gluing Activity educational toy A set of colored beadBox for Gluing Activity
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