# Category: Math and Art

## Betsy Ross’s 5-pointed star + 4th of July activities

## Tree for Springtime

## 11 Valentine & 2 President’s Day activities

## The Times Square ball

## Family fun math activities

## Winter Holidays – 18 activities

## 12/16/20 – Pythagorean Triples

## Ravensburger huge puzzle

## String design, ellipses, and orbital mechanics

Artistic way to encourage understanding of a conic section. Participants physically build an ellipse by choosing two foci and sketching the figure through a loop of string. While stitching an elliptical string design they puzzle about varying the foci spread and the loop length to create more extreme ellipses and are intuitively introduced to the measurement of eccentricity.