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Extension Assortment for LEGO Composing Set 9550 (49901-1) is a LEGO Learning release from 1990 with 121 pcs. GrailHub tracks it as part of the LEGO collecting lane, where set number, theme, release year, piece count, and display appeal all help collectors understand how the set fits on a shelf.
LEGO collectors often browse by theme first, so this page links back into Learning, LEGO, and related LEGO objects. Use those links to compare nearby releases, find other display sets, or move from a single set into the wider theme.
Related LEGO entries currently connected to this object include Photosynthesis Student Set, Chromosomes - Student Set, and DNA Student Set. These links make it easier to keep exploring without jumping back to a generic search page.
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