AIM: Free the red marble. Look closely inside the box. The ‘solution sheet’ is hidden inside… Designed by Wil Strijbos (Holland)

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AIM: Free the marble. Putting it back to its starting position is much more difficult than solving the puzzle. Designed by Ad van der Schagt (Holland)

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AIM: Remove the metal ring. An excellent design - very difficult to solve and our favourite in the range. Neither tricks nor clever lateral thinking are required to solve this one - just good, old fashioned, hard puzzling! Designed by Wil Strijbos (Holland)

AIM: Free the wooden bead. A tricky bottle puzzle with a long neck that's sure to set you back a bit! Designed by Ad van der Schagt - NL

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AIM: Remove the red cross. The sticks are very useful to put the cross back. But how do you first of all get it out? Designed by Jo Wils (Belgium)