One tractor, three stalls: build a farm market with magnetic blocks
The tractor has brought a delivery to the farm gate. The trouble is that the only place to unload is exactly where the cow likes to stand. That is enough of a plot for a tabletop market. With a few farm blocks, a scrap of paper for the queue and one person in charge of the gate, children can invent the rest as they go.
Set up the delivery before the stalls
Build the gate and a short lane first. Leave a clear square beyond the lane for turning round, then put the tractor or a pretend delivery vehicle outside the gate. The child playing the driver can try moving it through before anybody builds a barn. If the lane is too narrow, move the fence back and see how much extra room the delivery needs. A strip of paper makes a good lane if you want to save the blocks for the farm buildings.
The 100-piece Farm Animals set NC-100 comes with farm-themed 2 cm magnetic blocks, animal and farmer characters, a tractor, farm scene guides and a tin case. That mix works well here because there is somebody to drive, somebody to meet the delivery and an animal to put in exactly the wrong spot. Start with those few characters. There is plenty of time to bring the rest in when the first customer arrives.
Open three very small stalls
Put three scraps of paper in a row for the stalls. One can be a place for imaginary eggs, another for things grown on the farm and the third a place where a customer asks for something the farm hasn't made yet. Give each stall a different shape made with a few blocks. The person running the stalls decides what each shape means and shows the driver where the load is needed.
If two children are building, one can leave a short gap between the stalls and the other can test it with the tractor. Ask them where customers will stand without getting in the way of the delivery. A pair of blocks can mark a queue or become a bench. When the group starts negotiating where a queue ends and the cow begins, the layout is doing its job.
Run a one-stall market away from home
For a smaller table, use the 49-piece Farm Animals set NC-049. Its 2 cm farm-themed magnetic blocks come in a flip-top tin measuring 16.3 × 16.3 × 2.3 cm. The set includes a manual and a clear storage bag. There is enough of a scene to make a single counter, a short fence and a little space for one customer at a time. A paper arrow can do the work of an entire entrance road.
Try having one person open the stall and the other bring the first order. If a child wants to build a barn before serving anyone, let the pretend customers go to the barn instead. A game that still works when the rules change is especially handy if you only have the table for a few minutes.
Leave the farm ready for its next delivery
At the end, take a picture of the layout or have a child draw where the stall and gate were. Next time, put the gate on the opposite side and see what needs to move. The larger set suits a market with different jobs and buildings. The smaller tin suits a compact version with a single delivery and a shorter build. In either version, the moment to look forward to is when the driver reaches the gate, finds the cow there again and has to ask the stallholder for help.