The task we had called 'Dots' and now call 'Hearts and Flowers'-

Try your hand at the Hearts and Flowers Task with Hearts and Flowers
Findings from the Hearts and Flowers Task, Click Here & Click Here

Davidson, M.C., Amso, D., Anderson, L.C. , & Diamond, A. (2006). Development of cognitive control and executive functions from 4-13 years: Evidence from manipulations of memory, inhibition, and task switching. Neuropsychologia, 44, 2037 – 2078. (Mar 29; [Epub ahead of print])

Diamond, A., Barnett, W.S., Thomas, J., & Munro, S. (2007). Preschool program improves cognitive control, Science, 318, 1387-1388.

Flanker Task -

Try your hand at the Flanker Task with Flanker Fish
Findings from the Flanker Task, Click Here