Ingredients:
Tobbogan, 110 cm long
Deckchair (classic model)

1.
Unscrew middle rungs of toboggan

2.
Saw off outer rungs behind front transverse torsion bars, unscrew from rear bar.

3.
Attach two rungs at right angles to direction of travel to each front and rear torsion bar.

4.
Set up deckchair and screw together with transverse bars.