Amazon has this Educational Insights Micropro 48 - Piece Microscope Set for $27.25. This set ships for Free, and it makes a great little Xmas gift. It features:

• It has 50x, 100x, 150x, 300x, and 600x magnifications
• Perfect for individual or classroom use, the glass eyepieces and power settings from 50x to 600x provide users with superior precision viewing
• Not a toy, but a scientific instrument, the GeoVision MicroPro includes high
• The built - in light an drack - and - ponion focusing help deliver bright, clear images
• Includes glass lenses, die - cast metal body, and two eyepieces