An air bed mattress with built in sponge pump that is readily available at Target stores sometimes do not come with an instruction manual on how to inflate it. It leaves some buyers looking for guide elsewhere, much like the experience of this particular buyer who figured it out on her own and suggested to do this:
What I did: took off the cap and valve from the pump and pumped using my bare foot making sure I was covering the hole with my foot while pressing the pump and letting air in while lifting my foot. Because the sponge pump sends the air in other parts of the mattress, it’s hard to see that the mattress is in fact being inflated. There are two other valves on the mattress but they seem not to be used while inflating the airbed using the pump.
A word of caution, too…this mattress does deflate after a few hours. So, really it’s just a temporary bed and should never be considered as permanent house furniture.