You can now buy on line your ECG caliper & Ekg Caliper Pen by just clicking on the “buy now” button in each category.

We ship world wide!

To place a corporate order please call our office at:




Fax your purchase order to:

+1 602 220 0362


email us


We will be happy to answer any questions


help you with any special request.

Merchant Services

We now offer all major merchant services as per all details here, for all regular customers and schools please accept our sincerest apologies on the delay.

Overseas Orders

All order charged as per the rates and terms applicable at the time of purchase. The fee’s and postage are calculated on all orders automatically.

Local Delivery

It is always nice to get a hand delivered gift to your door and receiving a personalized baby gift or nappy cake for your bundle of joy simply adds to the occasion!

We are therefore pleased to offer our customers local delivery at a cost of $5 (10 miles max) – a perfect way to brighten someone’s day!

We can also deliver by post from $6 for all calipers. Other quantities vary, contact for more details.

We offer 2 membership schemes, plus a Childminder membership

Discount membership

Costing only £35 per year, this membership offers 20% off the Child’s entrance at any time and also 20% off all refreshments purchased at the Treehouse, plus 10% off any party booked at the Treehouse for a date during membership. You will also receive special event invitations or early notification of our open events.

Unlimited membership

This membership, at a choice of 3, 6 or 12 months, offers the child UNLIMITED entrance to The Treehouse (subject to availability due to capacity numbers). And of course, an accompanying Adult is also FREE.
Prices are:
3 months – £40
6 months – £70
12 months – £120 (equiv to just over £2 per week)

A copy of the membership application can be downloaded here

Childminder membership

To recognise and support the work of local childminders, we offer a Childminder membership. The membership, in the Childminders name as per their Childminders registration card, costs £260 and entitles the named Childminder to bring FREE of charge upto any 3 children during any week day.

To apply, simply download and complete this application form and bring this with you on your next visit

Loyalty card

We offer all visitors a loyalty card scheme whereby once you have visited us on 6 occasions and had your card stamped for those visits, your 7th visit is then FREE on us. Ask at reception for further details.

Visits as part of an offer or discounted entrance are not included.

Gift vouchers

The ideal Christmas or Birthday gift. How about gifting a ECG Caliper.
Our gift vouchers, available at face value, can be purchased at reception.