Marshmallow & Toothpick Geometry Cards – Printable STEM Building Challenge
Turn simple materials into big learning moments with these Marshmallow & Toothpick Geometry Cards! Kids use marshmallows and toothpicks to build 2D and 3D shapes, helping them practice engineering, spatial reasoning, and geometry concepts in a fun, hands-on way.
This set is perfect for STEM centers, engineering days, classroom challenges, or homeschool activities.
What’s Included
Printable geometry cards for 2D and 3D shapes
Visual diagrams of each structure
Clear building prompts
High-resolution PDF (8.5" x 11")
The 24 cards include the following shapes:
2D Shapes
Triangle
Square
Rhombus
Rectangle
Parallelogram
Trapezoid
Pentagon
Hexagon
Heptagon
Octagon
Nonagon
Decagon
Star
3D Shapes:
Cube
Triangular pyramid
Square pyramid
Pentagonal pyramid
Hexagonal pyramid
Octahedral pyramid
Triangular prism
Rectangular prism
Pentagonal prism
Hexagonal prism
Octahedral prism
Skills Kids Will Practice
Fine motor development
Spatial awareness
Understanding vertices, edges, and faces
Basic engineering and construction
Following directions and problem-solving
How to Use This STEM Activity
Just print the cards, gather marshmallows and toothpicks, and start building! This activity works well for:
STEM bins or maker spaces
Early finisher activities
Hands-on math lessons
Indoor recess engineering challenges
Friendly math league competition
Perfect For
Elementary classrooms (grades K–5)
Homeschool STEM
STEM nights and after-school clubs
Academic camps and enrichment programs
Kids who learn best by building and experimenting
Easy to Print & Prep
This printable PDF is designed for standard 8.5" x 11" paper. Laminate cards for long-term classroom use.
Instant Digital Download
No physical item will be shipped. Your file will be available immediately after purchase.
