David W.E. Roberts wrote:

12v car tyre pump up things run from the cigar lighter socket will probably
do the job
they even come with the correct adaptor for blowing up lilos etc.
only problem is getting 12v to the paddling pool

No, they won't in any way do the job. They have a very limited
duty cycle, and when you run them for more than 10 minutes at a
time, the motor has a tendency to unsolder itself from it's
wires, as well as melt all the insulation on the windings (yes,
done it twice).

--
Grunff