Difficulty is worth checking before you buy. A puzzle that is too easy gets solved once and put away, while one that is far too hard can end up back in the box. Many puzzles carry a difficulty rating, and it helps to match that to how much time the person likes to spend. Someone who wants a ten-minute coffee-break challenge needs something different from a person happy to pick away at the Genius Square puzzle game same puzzle over several evenings.

If you like the Genius Square, the same puzzle idea runs through a small family of games. Genius Star adds a bonus mechanic and a different set of pieces, Genius Gems and Genius Connection change the shapes and the goal, and Bee Genius is pitched at younger children who are new to shape puzzles. Each one keeps the roll-and-fill pattern while giving you a fresh challenge.

The trick to a family game night that does not fall apart is picking games that work across ages. Younger children lose interest when a game runs too long, and older players switch off when the rules are too thin. A mix of one quick game, one party game and one slightly longer game usually keeps everyone at the table without anyone getting bored or overwhelmed.

Because it runs on luck rather than skill, the game levels the field across ages. A grandparent, a parent and a small child can all play the same round, and the youngest is just as likely to reach the top first. That makes it a reliable choice for family gatherings, and a gentle, low-pressure way to get the youngest players involved in a game night.

Brain teasers can help pass the time on a commute or wind down at the end of the day, and they make a good talking point left out on a table. They are also handy gifts because they do not need batteries, a screen or another player. A well-made puzzle in solid metal or wood also tends to last, so it can be handed round the family for years.

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.