Fun Elastic (found here) makes for an easy headband – and it stays on – wahoo!
Just take a piece of elastic and some ribbon to fill the gap (my elastic was too short to go all the way around her head) – - –
And sew them right-sides together. Then turn it right-side out so the seams are on the inside. Done and done. The hardest part – deciding which side of the reversible elastic to use!