Without pump or compressor is no chance

The walker served as a gag for a birthday, the gag came to - filled therefore mission.
That the part with lung power was not blow up, I would not have suspected and the test run, fortunately a small compressor to hand (1st deduction), processing is accordingly - more than 1 night it should not survive the end, otherwise it looks very robust.
Price I find a bit high - but for a good gag's paid off ...