Life aka generations

I just finished it some minutes ago, pufff, I'm exhausted it's been 12 long hours in about a month time...yeah, I'm a bit lazy but I've worked on other things too at the same time I must admit I'm really proud of it, hands have been a challenge, a worth trying thing to draw
This is dedicated to Ricky Martin for his great charity work [link] I felt inspired by him for being such a wonderful person, and as he helps children, I thought it suited perfectly to pay a tribute to him
Materials:
H, 5b, 6b and 8b pencils
0.5# mechanical pencil with 2b lead
Eraser pencil
Eraser
Tissue paper and blending stump
A3 romani paper
time: 12 hours

All kind of critics are welcome

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Thanks a lot to for letting me use his gorgeous "generations" [link] as reference