ArcTumble Gravity Stack Game, Family Balance Challenge, Montessori Physics Toy, Fine Motor Skill Gift

Bring color, strategy, and a little suspense to game time with the ArcTumble Gravity Stack Game. Players take turns placing chunky blocks along the curved rocker while trying to keep the structure steady. Every move changes the weight distribution, creating a fresh spatial challenge each round.

MINIMUM AGE
Ages 3+.

The set includes one curved rocker and 12 chamfered blocks in three sizes: four small, four medium, and four large. Mix the sizes to experiment with balance, planning, and center of gravity while building fine motor control and hand-eye coordination. Play solo for a calm focus challenge or take turns with family and friends. The set arrives ready for play.

COLORWAYS

- Arcade Pop: Charcoal rocker with four Scarlet Red, four Lemon Yellow, and four Marine Blue blocks.
- Ocean Byte: Dark Blue rocker with four Ice Blue, four Sky Blue, and four Ivory White blocks.
- Candy Shift: Plum rocker with four Sakura Pink, four Lilac Purple, and four Ivory White blocks.
- Citrus Circuit: Dark Green rocker with four Lemon Yellow, four Mandarin Orange, and four Apple Green blocks.

MONTESSORI-INSPIRED LEARNING
The open-ended set offers a hands-on way to form and test predictions: Which block size changes the balance most? How does placement affect the rocker? Children can sort the three sizes, compare outcomes, record attempts, or design repeatable challenges for practical STEM exploration on homeschool, Montessori-inspired, preschool, and classroom shelves.

MEASUREMENTS

- Rocker: approximately 7.9 in long x 3.9 in wide x 1.6 in high.
- Small blocks: approximately 2.0 in long x 0.8 in wide x 0.8 in high.
- Medium blocks: approximately 2.0 in long x 1.2 in wide x 1.2 in high.
- Large blocks: approximately 2.0 in long x 1.6 in wide x 1.6 in high.

HOW TO PLAY

1. Place the rocker on a flat table.
2. Take turns positioning one block at a time.
3. Keep adding blocks while the rocker shifts beneath the growing arrangement.
4. If the blocks tumble, reset and try a new strategy.

IDEAL FOR

- Fine motor and hand-eye coordination practice
- Early physics and center-of-gravity exploration
- Solo focus sessions or family game nights
- Preschool, homeschool, and classroom activity shelves
- Colorful desk play and thoughtful gifting

CARE

Wipe clean with a soft, slightly damp cloth. Keep away from high heat.

SAFETY

Recommended for ages 3+ with adult supervision. Inspect before each use and discontinue use if any piece becomes damaged.

Designed by TheGulzar3D.

SPECIALTY COLORWAY
Choose "Specialty: see chart" and enter the requested component colors in the optional Custom color request box, using exact names from the full color reference photos.

For specialty colors, choose from the complete swatch photo and enter the exact color name or names in the optional Custom color request box.

WARNING: CHOKING HAZARD — Small parts. Not for children under 3 years.