Solo puzzle games are useful when you need to keep one child occupied without a second player. The Genius Square and Genius Star are self-contained, so a child can roll, place and solve on a tray table or a picnic blanket without anyone else joining in. Card games such as Flip 7, available from The Happy Puzzle Company, come into their own when the whole family wants a quick round at a campsite or in a holiday cottage.

These games are a good pick if you want screen-free play that travels well and does not need a long rulebook. You can compare the full Genius line-up and read how each version plays at brain teaser puzzles.

Part of what makes it work is the head-to-head option. Two players each take a grid, roll the same starting positions, then race to finish first. A single round takes only a few minutes, which makes it easy to fit in before dinner or on a rainy afternoon. It suits ages six and up, and adults tend to get just as competitive as the children.

Piece count is the first thing to settle when you choose a jigsaw. Puzzles for young children usually have large pieces and a low count, so small hands can manage them, while 500 and 1,000-piece puzzles suit older children and adults who want a longer sit-down. If you are buying for someone new to jigsaws, it is better to start lower and work up than to hand over a 2,000-piece puzzle that never gets finished.

The Genius Square has become a favourite for families and solo puzzlers who want a game that sets up in seconds and plays differently every time. You roll the seven dice, place a blocker on each grid square the dice point to, then fit the nine coloured shapes into the space that is left. There is always at least one solution, and often more than one, so nobody gets stuck on an impossible board.

The image matters as much as the count. Scenes with plenty of variety, such as busy street scenes or landscapes with lots of colour, give you clear areas to work on and tend to feel achievable. Puzzles that are all one colour, or that repeat a pattern, are far harder because you cannot rely on the picture, so save those for someone who likes a proper challenge.