This is a number game hidden inside a digging game. A small child in our house was solid on numbers up to twenty and starting to puzzle over two-digit numbers, the way “fourteen” and “forty” sound alike and look different. The trick to making that stick was to bury it in a sensory bin full of colored rice, hand over a fistful of construction vehicles, and let the math surface one dug-up magnetic number at a time. The digging is the draw. The number recognition is the part that happens almost by accident. Ages 4 to 7.
What you need
- A shallow tub or sensory bin. Any wide, low-sided container works. A storage box, a wide plastic bowl, a low baking tray.
- Colored rice. Dyed rice is easy to make: a few cups of dry rice, a splash of white vinegar, a few drops of food coloring, shaken in a bag and spread to dry. Red, orange, and yellow for the “site”, plus brown to bury everything under.
- A set of magnetic numbers, the fridge-magnet kind. Two of each single digit, zero through nine, is ideal.
- A small magnetic dry-wipe board and a dry-wipe pen.
- A handful of small plastic construction vehicles. Diggers, dump trucks, bulldozers. Anything that can scoop or push rice.
Setting it up
Pour the red, orange, and yellow rice into the bottom of the bin and scatter the magnetic numbers over it. Then pour a layer of brown rice over the top to hide the numbers completely. The brown layer is the “dirt” the diggers have to move to find the numbers underneath.
Stand the small dry-wipe board up at one end of the bin (or lean it against the side) and write several two-digit numbers on it with the pen. These are the targets. Drop the construction vehicles in on top, and the site is ready.
How it plays
The first twenty minutes are pure digging. A small child will push the brown rice around with a bulldozer, scoop it with a digger, dump it from one end to the other, long before they care about any hidden numbers. That is fine. The sensory play is doing its own quiet work: the scoop, the pour, the push are all wrist and grip control.
Then a vehicle turns up a magnetic number, and the game shifts. The rule we used: dig up a number, look at the dry-wipe board, and check whether that digit appears in any of the target numbers. If it does, place the magnet on the board next to the matching written number. If it does not, set it aside (a dump truck makes a good holding bay).
The aim is to dig up the right digits to build a complete two-digit number on the board. Once a number is matched, the child reads it aloud, takes the magnets off, wipes the written number away, and starts on the next one.
Why the digging matters
The reason this works better than flashcards is that the number recognition is wrapped inside something a small child actually wants to do. Nobody volunteers to drill two-digit numbers. Everybody wants to drive a digger through a bin of rice. By the time the numbers start surfacing, a child is already deep in the play and happy to read each one to keep the digging going.
What surprised me most was how quickly ours took over the setup. After a couple of rounds, the child wanted to hide the numbers, write their own target numbers on the board, and run the whole thing solo. That is the sign the activity has done its job: the math has stopped feeling like a task and started feeling like the rules of a game they own.
Stretching it further
The bin stays good for days. Once two-digit numbers are easy, write three-digit targets on the board. Or flip it: write a number in words (“thirty-six”) and have the child dig up the digits to match. The colored rice keeps its color for months in a sealed tub, so the whole bin packs away and comes back out whenever a number concept needs a hands-on home.
This activity pairs well with the picture book Goodnight, Goodnight, Construction Site by Sherri Duskey Rinker, which is where the construction theme came from. Read the book, then build the site.
For another hands-on number game in the same age band, our odd and even number fishing uses a magnetic rod and numbered fish for parity practice. And for a quieter sit-down option once the rice goes back in the tub, our free summer coloring pages give a child something to color when the diggers are parked.