We present a new teaching and outreach activity based around the construction of a three-dimensional
chart of isotopes using ##IMG##
[http://ej.iop.org/images/0031-9120/52/2/024001/pedaa550cieqn001.gif]
{$\text{LEG}{{\text{O}}^{\circledR}}$} bricks 5 . The activity, binding blocks , demonstrates
nuclear and astrophysical processes through a seven-meter chart of all nuclear isotopes, built from
over 26 000 ##IMG## [http://ej.iop.org/images/0031-9120/52/2/024001/pedaa550cieqn003.gif]
{$\text{LEG}{{\text{O}}^{\circledR}}$} bricks. It integrates A-Level and GCSE curricula across areas
of nuclear physics, astrophysics, and chemistry, including: nuclear decays (through the colours in
the chart); nuclear binding energy (through tower heights); production of chemical elements in the
cosmos; fusion processes in stars and fusion energy on Earth; as well as links to medical physics,
particularly diagnostics and radiotherapy.