What is the best way to work out your biceps and abs if you can't go to a gym and you have no free weights at home?

A good way to work out your biceps is to sit in the floor with your legs straight in front of you and toes to the ceiling. Rest your body on the palm of your hands with your arms behind you. Your fingertips should be facing your bum. Lift yourself up a little then bend your elbows multiple times for the biceps workout.