Sizzors and Tape are a henna artists tools. Be sure you have this by your side to adjust your cone.

Cut a small tip off the end of the cone.

Warmup idea:

Start drawing with pen on paper your design idea,
Next, draw over the copy of the picture on paper you drew using the henna cone.

You can start on skin..., luckily
henna lets you wash off n try over again right after application if you need.
Jagua gel stains immediately so you can only apply once.

Your Henna cone/Jagua cone require similar care.
Place both in the freezer for future use.

Please read the Henna How to 
and the FAQ to understand better how to handle these mediums.