Circuit Blox 395 vs 120: Which Student Set to Buy?
By Startseite | Published: 2026-10-23
Category: Comparisons
Compare Circuit Blox 395 and 120 student sets on projects, grade level, and teacher support to find the right fit for your classroom or child.
Quick Answer
Choose the Circuit Blox 395 Student Set if you teach grades 4-6 and want more projects plus a detailed teacher guide; pick the Circuit Blox 120 Student Set for grades 3-5 when budget is tighter and fewer projects are enough.
Project Count and Grade Level
The most obvious difference is the number of projects: 395 versus 120. That jump means the 395 set supports deeper exploration and more varied builds, which suits older students who can handle longer challenges. The 120 set is a solid entry point for younger learners, offering enough variety to cover core concepts without overwhelming them.
Both sets address NGSS requirements, so either choice aligns with standard science curricula. The grade bands differ—grades 4-6 for the 395 and grades 3-5 for the 120—so consider the reading level and attention span of your students when deciding.
Teacher Support and Lesson Depth
Teacher support is where the sets diverge significantly. The 395 set includes a 126-page Teacher Guide with curriculum lessons, quizzes, and answer sheets. The 120 set comes with a 79-page guide covering similar topics but with less depth. If you need ready-to-use lesson plans and assessments, the 395's more extensive guide saves preparation time.
Both guides cover the same lesson themes—electricity, motors, light, sound, switches, and telecommunication—but the 395 includes additional lessons that go further into advanced STEM concepts. For a full-term curriculum, the 395 is more complete; for a shorter unit, the 120 may be sufficient.
Price and Value Trade-off
Price reflects the difference in scope. The 395 set lists at USD 109.99 but is available for USD 73.69, while the 120 set lists at USD 82.49 and sells for USD 50.32. The 395 costs about USD 23 more but delivers over three times the projects and a more robust teacher guide. If you budget per student, the 395 offers better long-term value for a full year of instruction.
However, if you're buying for a single child or a short camp, the 120 set may be the smarter buy. It covers the same foundational lessons at a lower price, and you won't waste projects that go unused.
Trade-offs at a Glance
- Project quantity: 395 projects offer more variety and longer engagement; 120 projects are quicker to complete and less overwhelming for younger kids.
- Teacher guide depth: The 395's 126-page guide includes more lessons and quizzes, ideal for a full curriculum; the 120's 79-page guide covers essentials for a shorter unit. Check how many lessons you need to teach; if you run a semester-long course, the 395 guide aligns better.
- Cost per project: At current prices, the 395 costs about USD 0.19 per project versus USD 0.42 for the 120, making the 395 more economical per build. If you plan to use most projects, the 395 gives more value; if you only need a few builds, the 120 is cheaper upfront.
Product Facts
- Circuit Blox™ 395 Project Student Set - E-Blox® Circuit Board Building Blocks Educational Sets: Includes a 126-page Teacher Guide with curriculum lessons, quizzes, and an answer sheet; covers grades 4-6 and advanced STEM concepts. You get a ready-to-teach program with assessments, saving planning time and supporting deeper learning for older students.
Circuit Blox™ 395 Project Student Set - E-Blox® Circuit Board Building Blocks Educational Sets - Circuit Blox™ 120 Project Student Set - E-Blox® Circuit Board Building Blocks Educational Sets: Includes a 79-page Teacher Guide with lessons, quizzes, and an answer sheet; designed for grades 3-5 building on STEM concepts. It provides a lighter but still complete curriculum that fits younger learners and shorter teaching units.
Circuit Blox™ 120 Project Student Set - E-Blox® Circuit Board Building Blocks Educational Sets
Who Should Buy Which
Best for
- Teachers of grades 4-6 who need a full curriculum with assessments and want to cover advanced STEM topics
- Parents or educators planning a year-long STEM program and wanting the most projects per dollar
Not for
- Younger students in grades 3-4 who might be overwhelmed by 395 projects; the 120 set is a gentler start
- Budget-conscious buyers who only need a short introduction to circuits and won't use the extra projects
