Pictures for signatures and favicons for grandpa

The pictures below are for me to use for signatures in forums or favicon for blogs or websites.

Like this one:
Grandpa
Robotics for Children

Pictures taken from Flickr Creative Commons Advanced search for pictures which can be modified (also from Google search). If you see any images that are yours and object to me using it or you allow me to use it with suitable acknowledgements, please contact me through my contact form):

Lego grandpa 1 (square):

Lego grandpa 2 (square):

grandpa 1

grandpa 2

grandpa 3