The Fisher Price Easy Link Internet Launch Pad is on sale right now for $14.13- marked down from $39.99. This is a device to help your preschooler learn to use the computer safely and it has pretty good reviews.
Amazon: Fisher Price for Preschoolers 65% off
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I got one for my son last year after Christmas sales at Target for $6.24. My son loves it and it is very educational.
Both my son and nephew have one and love it.