Move every player through the multicolour course, keep cleared doors open, cross the paired switches, and relay the tomato timer into its final holder.
Go to the multicolour scaffold course around 3700, 1950 with at least two players. Stack one player over the first wall so they can open the entrance from inside, then hold the next button until the whole group is through. Leapfrog up the large block stairs, crouch under the low wall, and cross the red planks. Press the two switches at the same time to open the final section. Before touching the timer, send one player off the platform and up the red stairs to wait by the far holder. The other player removes the tomato-shaped timer from the left holder and throws it across; the receiver catches or collects it and places it in the far holder before it expires.
Use the map or laser pointer to reach approximately 3700, 1950. The correct place is an open-air obstacle course made from yellow decks and large red, green, and blue walls. If you see only a small house or a flat symbol board, you are at a different Blue Tower puzzle.
Travel to the coordinate and look for stacked blue, green, and red wall panels above wide yellow platforms. Bring the group to the lowest entrance together.
You are facing a tall open scaffold course, not an enclosed room or a five-symbol board.
Have one player stand against the wall while the other climbs or bounces from their head onto the upper deck. The player who gets over first should open the entrance from the inside.
One player is on the upper yellow deck and the first door is open for the teammate below.
The leading player presses and keeps holding the wall button. Everyone else walks through the open doorway before the holder releases it and follows.
The entire group is on the same side of the door; nobody has to restart the opening wall.
Use each other as a boost to climb the large coloured block stairs. Continue together, duck under the low wall where standing height is blocked, then line up for the red-plank crossing.
Both players reach the upper red section beyond the blocks and low clearance without leaving a teammate below.
Cross the narrow red planks one player at a time. At the next gate, put one player on each switch and use a 3-2-1 call so both controls are pressed together.
The final route opens while both switches are active and the group can reach the timer platform.
Do not remove the timer yet. One player drops from the platform, runs up the red stairs, and waits beside the empty holder on the far platform. The sender remains by the left holder.
The receiver is already across the gap and can reach the far holder before the timed object starts beeping.
The sender removes the tomato-shaped timer from the left holder and immediately throws it toward the receiver. The receiver catches or picks it up, then places it into the empty far holder before the timer expires.
The timer is seated in the far holder and the course completion reward unlocks.
Use one climber/button holder and one follower through the early stages. At the finish, keep one sender at the left holder and pre-position the other as receiver by the far holder.
Keep two fixed switch roles and move all extra players through before releasing held doors. For the timer, only the chosen sender and receiver should touch the object.