Well I am a mother times 2 and about 12 years older than you so I know what you are talking about. Any kind of
exercise that requires use of your legs is great.
Walking is awesome for toning hips, thighs, and butts. Also lunges work well because they tone as you use your body weight for resistance. Squats work good too. Cellulite will probably never go completly away, but the more toned and muscular your legs appear the less the cellulite will be noticable. I hope this helps.