# Free Trial – Very Little Lemmas (3-4) with Trilemma Grappling

> A 30-minute parent-and-child intro class for 3-4 year olds. Parents join in — wear something you can move in!

- Host: Trilemma Grappling
- Duration: 30 min
- Location: 2/71 Smith Street, Ciccone NT 0870
- Host time zone: Australia/Darwin
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/trilemma/trial-vll
- Event type id: 5289733

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5289733&start=YYYY-MM-DD&end=YYYY-MM-DD&timeZone=<IANA time zone>
cal-api-version: 2024-09-04
```

The response is `{"data":{"YYYY-MM-DD":[{"start":"<ISO 8601 with offset>"}]}}`; no API key is needed.

## Book

```http
POST https://api.cal.com/v2/bookings
cal-api-version: 2026-02-25
Content-Type: application/json

{
  "eventTypeId": 5289733,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "smsReminderNumber": "…",
    "phone": "…",
    "experience": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `smsReminderNumber` (Phone number (Text notifications)), `phone` (Phone Number), `experience` (Has your child done any martial arts before?)
- Optional fields: `notes` (Anything we should know? (injuries, concerns, etc.)), `guests` (Add guests)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.