Many of the songs in this book can be played using the C and G7 chords you learned in this lesson. You will need to be able to change from C to G7 and back again.
Strum a G7 chord twice, then change to a C chord. To make this change easy, slide your third finger along the first string to the third fret. Only touch the string very lightly as you do this. Finish this song by playing the C chord once and letting it ring.
When changing from C to G7, do not lift your third finger off the string, but slide it down to the second fret. After you have played this song twice, finish it by strumming the C chord once.