WPPSI like / Intelligence Test Block

These are similar to the blocks used in intelligence tests. 2.5cm. Children are shown a pattern on paper and asked to replicate the pattern with the blocks

Assembly

To make two blocks, print two copies of the STL in different colors. I believe white and red are common. The two halves fit together with friction. The snap connector isn't perfectly centered so rotating the halves 180* might give a better fit.

Print settings

• Prusa MK3S+
• 0.3mm draft
• 1.75 mm PLA, Polyterra Matte White/Watermelon

Which file to print?

• WPPSI Block x1 → start here, if too tight, then try the next
• WPPSI Block x1 Lower Tolerance → snap connector is smaller, will provide less friction
• WPPSI Block x5 Lower Tolerance → same as above but prints 5 copies

Why no STL/STEP file?

• I did the cut and connector in PrusaSlicer which can't export this boolean operation correctly
• If you want to reproduce, import a 2.5mm cube, cut in PrusaSlicer with snap connector that is 7.5mm (size) 7.5mm (depth)

Ideas for improvements

• Add glue and clamp together for tighter fit
• Rework model with a separate pin connector so that the mating faces can be printed face down and then glued together
• Rounded corners

This is not an official block and may not match those used in standardized test