Rekenrek Frame — 3D-printable model preview

AR view

Science & education Medium

Rekenrek Frame

Teach counting in fives and tens with beads

A 20-bead rekenrek, the Dutch counting rack that teaches number sense in fives and tens: two rods run the length of a 260 mm tray, ten beads on each, five red and five white. Children slide groups across to see 7 as 5 and 2 at a glance. Uses 4 mm rods or bamboo skewers.

Customize this model

Size: 260 × 90 × 40 mm
Shape: Rectangular
Walls: 4.0 mm
Volume: 95.1 cm³
Est. weight (PLA): 118 g
Parts to print: 1
Category: Science & education
Made by: Krypto
Built in: 36 steps

What’s in it

Rectangular, 260 × 90 × 40 mm, with 4.0 mm walls
4 holes in the walls
Engraved text: “REKENREK”

How to print it

Two 4 mm rods 260 mm long; twenty 20 mm wooden beads.

Prints as shown on its floor, no supports.

Filament: at most about 118 g of PLA printed solid (roughly $2.36 at $20 per kg); normal infill uses less.

To get the files, open it in the generator and choose File › Download STL (one file per part) or Download 3MF (every part on one plate).

Questions

What size is the rekenrek Frame model?

The rekenrek Frame model measures 260 × 90 × 40 mm (width × depth × height). You can change every size in the free SO3D.xyz generator before you download it.

Does it need supports?

No. Two 4 mm rods 260 mm long; twenty 20 mm wooden beads. Prints as shown on its floor, no supports.

How much filament does it use?

At most about 118 g of PLA (95.1 cm³ printed solid), roughly $2.36 of filament at $20 per kg. Normal infill uses less.

Can I change it?

Yes. Open it in the SO3D.xyz generator (free, in your browser), change the size, walls, dividers, holes, text or anything else, then download it as STL or 3MF for your slicer.

More science & education

Newton colour wheel spinner

Show that the spectrum colours mix to white

Simple

Kaleidoscope body for three mirror strips

Make a kaleidoscope

Multi-part assembly

Weather sensor radiation shield

Shield a weather sensor from sun and rain

Multi-part assembly

Eclipse viewer frame

Hold solar viewing film safely

Medium

Water clock

Measure time with dripping water

Medium

Voussoir Centring

Support arch blocks while the arch is built

Simple

Voussoir Wedge

Build a self-supporting arch from nine blocks

Simple

Fulcrum Beam

Show balancing moments with coins and clips

Simple

See all 71 in Science & education

Make it fit your space

Change the size, walls, dividers, holes and labels of the rekenrek Frame model in your browser, then download it for your printer. Free, no CAD needed.

Customize this model