The best replacement for train set is imaginarium.

The best alternatives to train set are rated as following:
★★★★★  imaginarium
★★★★★  geotrax
★★★★  kidkraft train set

Your alternative for train set is not listed? Suggest!
Speaking about train set, one probably shouldn't forget about lincoln logs.

Other search terms related to train set and their ratings are:
★★★★★ lincoln logs
★★★ activity table
You have in mind a companion for train set and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of train set in all years. Click on graph for more.
train set
imaginarium
geotrax