For a group of twenty children - ten simultaneous games:
Everything else - timers, scoresheets, banners, trophies - is optional and can wait until there is a reason for it.
On size: a king of about 8-9 cm with squares to match is the tournament standard and the right choice for a class. Smaller pieces are harder for children to handle and easier to lose.
And buy one spare set. Pieces disappear in a school faster than anywhere else, and a set missing a knight is a set nobody can use.
Not at first, then yes. In the first months a clock only creates panic; after that it becomes one of the most motivating objects in the room.
Everything else on this page is either compulsory or postponable. The demonstration board is the exception: it is not strictly necessary and it changes how a group works.
Without one, explaining a position to twenty children means twenty children crowding around one small board - which does not work, and takes five minutes to organise every single time. With one, the explanation takes as long as the explanation.
How a session using one is structured - running a children's group.
If the group travels to events, the packing rules are the same - transporting a set.
A school chess group frequently starts with no money at all. That is workable.
What not to do: delay starting until the equipment is complete. A group running with borrowed boards for a term is a group that exists; one waiting for a budget usually never starts - running a school tournament.
For twenty children: ten boards with pieces, a demonstration board, five to ten clocks introduced later, printed puzzle sheets and a lockable cupboard in the room. Everything else can wait until there is a reason for it.
Rollable vinyl boards with plastic pieces: cheap, hard to damage, easy to store and easy to clean. A king of about 8-9 cm is the right size. Buy one spare set - pieces disappear in schools faster than anywhere else.
Not in the first months, when a clock only creates panic. Once children are finishing full games, introduce them with a long control and a digital increment. Half the tables is enough at first, rotating which pairs use them.
Yes - it is the one optional purchase that genuinely pays for itself. Without it, explaining a position to twenty children means crowding them around one small board every single time. It costs about as much as two or three ordinary sets.
Ask parents, who often have unused sets at home; ask the local club or federation for equipment they are replacing; ask a local business to fund something concrete like boards or a demonstration board. And start with six boards rather than waiting for a full set.
The Vibe Chess app is built for an evening over the board, not for online play: it keeps the sign-up list, the pairings and the table while you deal with people and the venue. All of it free.
The bot is constantly improved based on real tournaments. If you need a feature that isn't there yet, message the developers right inside the bot with the /support command. Many features appeared exactly because organizers asked for them, and useful ideas get added quickly.
For schools - running a children's group, a school tournament. Equipment - demonstration boards, transporting a set.