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3 Piece Lego Mechanical Puzzle (Intersecting Planes) : 4 Steps (with Pictures) - Instructables

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Plus-Plus is one shape with endless possibilities! The 70 piece Airplane tube is a great way to get started with Plus-Plus. Kids will learn to create in 2D or 3D, encouraging open-ended, creative play. It’s a perfect STEM toy to develop fine motor skills, focus and patience. Gift them as a party favor, package topper, or new-big-brother or sister present. Suggested for ages 5-12.

Plus-Plus Airplane Tube

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3 Piece Lego Mechanical Puzzle (Intersecting Planes)