Toss it and see where it goes! It'll smash if it hits any blocks, so aim carefully. Tap the direction you want to throw it. The further from yourself you tap, the harder you throw.
Rubber Band Airplane price in Growtopia: sells for about 10 DL (median of 1 offers from community Discords, past 30 days). Live price chart and the latest buy and sell offers.
Recently sold at: TOPSOIL