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Snack Mobile: Fair Shares in the Treehouse
Created by Argraide
Updated October 27th, 2026
At a glance
- Staff pick
- Picked by the Argraide team
- Play mode
- 📱 Solo
- Format
- 🧊 3D
- Length
- ⏱ About 20 minutes
- Subject
- Math
- Grade
- 3
- Curriculum
- Ontario
- Curriculum codes
- B1.6B1.7
About this activity
A 3D physics lab in a treehouse kitchen. Students cut honey bars and berry pies with free knife strokes, deal piles of acorns and cut the leftovers, then press Serve: the pieces drop into the baskets of a big hanging mobile that swings toward any bigger share. When every share is equal the mobile hangs level and each share is named as a fraction or mixed number. Later, newcomers are balanced with equivalent pieces.
What students learn
- B1.6: solve fair-share problems by cutting bars and pies into equal parts and sharing up to 20 acorns among 2, 3, 4, 5, 6, 8 or 10 critters, with whole-number, fraction and mixed-number shares
- B1.6: see that pieces only count as halves, thirds or fourths when they are the same size (the misconception: any 2 pieces are halves)
- B1.7: build a share equal to 1 half, 3 fourths, 2 thirds or 2 fifths from fourths, eighths, sixths or tenths (equivalent fractions)
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