Material shelf · beads, pegs, blocks and bolts · 4 activities

Wooden Manipulatives

Four activities built on graspable objects: wooden beads on a lace, fat pegs in a board, solid blocks under a torch, and nuts turning down a bolt.

Size is what makes these work, and the numbers are narrow. A bead of 15 to 20 mm with a 5 mm hole is what a three year old can hold in one hand and aim at with the other. A peg wants to be 8 to 10 cm long and thick enough to feel, because under 6 cm it becomes a mouthing job rather than a placing one. Hex bolts of 10 to 16 mm thick with a 6 to 8 cm shank are the band small fingers can grip and turn, and the long shank is what gives a dozen turns instead of three.

Every one of them also has a version that works tonight, out of the kitchen. Penne pasta coloured with felt tips laces exactly like beads, and takes five minutes plus ten to dry. Crayons, or chopsticks snapped to 9 cm with the ends rubbed blunt, stand up in a board like pegs. The jar shelf gives the same turn as the bolts: a jam jar, a coffee jar and a bottle cap are three diameters of one movement, and nothing on the table is small enough to swallow. A tin of beans, a mug, a dice, a matchbox and a cardboard tube are the solid shapes, and a tin is the good one because it throws a circle from one direction and a rectangle from another.

The board under the pegs matters more than the pegs do. Firm foam about 5 cm thick holds a peg upright with a little friction, and that friction is the feedback that says the peg is home. Three layers of corrugated card glued flat and left under a book overnight does the same and wears out after a few weeks, which is fine, because another one takes two minutes. Make the hole 1 to 2 mm wider than the peg: tighter needs adult force, looser lets the peg lean, and a peg that will not stand reads as failure to a two year old.

If you do buy the bolts, take them to the shop and try every nut on before paying. A nut half a size out looks right on the shelf and jams a quarter turn in, and that reads to a three year old as the thing being broken. A new thread is stiff, so rub the bolt with a candle stub and run the nut up and down a few times first.

The four

Ordered by the age they suit best. Each line gives the setup time, the play time and whether anything has to be bought.

Five bolts and five nuts cost about as much as a coffee and last for years, and each page names its household stand-in at the top.

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