Penny Drop Party Game v2

Model updated January 2026:

• box height reduced - don't really need that much space to store the pennies and die.

• added vertical features to outer perimeter - reduces box warping, improves appearance

• added hex pattern in the base of the box - reduces warping, eliminates the "benchy hull line" completely

• added tolerance between the box and lid so it closes without forcing

• deepened the numbers/hole perimeter to 5 layers and connected them all with thin lines so they can be manipulated as a single object in the slicer

• removed the pause for magnet placement - the MK4S at least prints the bridges just fine over the magnet holes, and I've glued them in without issue.  I agree the result looks a bit rough but it works fine.

The last 4 photos are of version 1 - note the "bulge" near the bottom of the box!

Game Description

Played this at Christmas in 2024 with 9 family members and enjoyed it - it's now a must-play at every family get-together!  Ages 6 and up, 2-20+ players.

Materials needed:

• a 6-sided die

• 5 pennies per player

• (2) M3x30 bolts for the hinges

• (4) 10x5x2 magnets (optional) and glue (CA/Crazy Glue is good)

Rules:

• The goal of the game is to be the first player to get rid of all your pennies.

• give between 5 and 8 pennies to each player, leave the rest in the box.  The starting number of pennies affects the duration - more lengthens the game.  5 should be the minimum though.

• choose a starting player.

• Each turn the active player must roll the die at least once.  If the corresponding slot is empty, put a penny in it from your pile.  If there is already a penny in the slot, the player must take back all pennies in slots 1-5 and their turn is over.

• After the first roll, the player can choose to roll again, or end their turn.

• After a player's turn ends, pass the box including any pennies in the slots to the next player.  They now have to roll at least once as per above.

• Note that slot 6 drops the penny into the box, where it stays until the end of the game.

Printing

• I printed in PLA.  The magnets help keep the box closed.

  • I used CA glue to put the magnets in afterwards, ensuring they are oriented to attract rather than repel!

• Print the top (2-color print) with the numbers face-down on the build plate.

• Files to print:

  • Lid_Nums

  • Box

• 0.4 nozzle, 0.2mm layer height.

• I used 2 perimeters, gyroid infill 10%

• I manually painted supports on the "top" of the hinges for the lid since the angle is quite extreme.  I reduced the "Top Z distance" to 0.1mm and it still removes easily with a knife.

• M3 bolts are inserted from the outside and the threads only engage the innermost hinge section.